Calibrated dose control
View Patent ↗Methods and vaporizer apparatuses that estimate, measure and/or predict the amount of vapor and/or material (including active ingredients) released by the vaporizer apparatus. In particular, described herein are electronic vaporizers and methods of using them that determine a dose/amount of vapor and/or a material in the vapor based primarily or exclusively on the electrical and thermal properties, e.g., power or energy applied to the vaporizing element (e.g., heating coil) and the temperature of the material immediately before and as it is vaporized. Dose information may be used to control operation of the device and/or reported to the user.
1. A method of determining a dose of a vaporizable material when using a vaporizing device over a time period, wherein the time period comprises a plurality of sequential time intervals, and wherein the vaporizing device includes a heater controller, a heater, a source of the vaporizable material including an active ingredient, and a dose predictor, the method comprising:
applying power, from the heater controller to the heater, to vaporize the vaporizable material during the time period;
transmitting a power reading of the power applied from the heater controller to the heater at each of the plurality of sequential time intervals, from the heater controller to the dose predictor;
calculating, for each of the plurality of sequential time intervals and at the dose predictor, a partial dose, wherein the partial dose is calculated based on subtracting a second term from a first term, wherein the first term comprises the power reading of the power applied from the heater controller to the heater to vaporize the vaporizable material during a partial dose time interval, and wherein the second term comprises a temperature of the vaporizable material during the partial dose time interval or a temperature of the vaporizable material before the partial dose time interval;
summing the calculated partial doses, at the dose predictor, to determine a total dose delivered during the time period;
determining an amount of active ingredient delivered to the user based on the total dose of vapor delivered; and
providing feedback, based on the total dose, to modify the operation of the vaporizer device.
2. A method of determining a dose of a vaporizable material when using a vaporizing device over a time period, wherein the time period comprises a plurality of sequential time intervals, and wherein the vaporizing device includes a heater controller, a heater, a source of the vaporizable material, and a dose predictor, the method comprising:
applying power, from the heater controller to the heater, to vaporize the vaporizable material during the time period;
transmitting a power reading of the power applied from the heater controller to the heater at each of the plurality of sequential time intervals, from the heater controller to the dose predictor;
calculating, for each of the plurality of sequential time intervals and at the dose predictor, a partial dose, wherein the partial dose is calculated based on subtracting a second term and a third term from a first term, wherein the first term comprises the power reading of the power applied from the heater controller to the heater to vaporize the vaporizable material during a partial dose time interval, wherein the second term comprises a temperature of the vaporizable material during the partial dose time interval, and wherein the third term comprises a temperature of the vaporizable material before the partial dose time interval;
summing the calculated partial doses, at the dose predictor, to determine a total dose delivered during the time period; and
providing feedback, based on the total dose, to modify the operation of the vaporizer device.
3. The method of claim 2 , further comprising determining an amount of active ingredient delivered to a user based on the total dose delivered.
4. The method of claim 2 , wherein calculating further comprises determining a change in temperature (ΔT) of the vaporizable material being vaporized for each of the sequential time intervals relative the temperature of the vaporizable material being vaporized.
5. The method of claim 2 , wherein the sequential time intervals are between about 200 msec and about 10 msec.
6. The method of claim 2 , wherein calculating, for each of the sequential time intervals, the partial dose is further based upon a latent heat and a specific heat of the material.
7. The method of claim 2 , wherein subtracting the second term and the third term from the first term comprises subtracting, from a first constant times the power reading of the power applied from the heater controller during the partial dose time interval, a second constant times the temperature of the vaporizable material during the partial dose time interval and a third constant times the temperature of the vaporizable material before the partial dose time interval.
8. The method of claim 2 , wherein the temperature of the vaporizable material during the partial dose time interval and the third term comprises the temperature of the vaporizable material being vaporized before the partial dose time interval are determined based on an electrical property of the heater that is proportional to the temperature of the heater.
9. The method of claim 2 , wherein providing the feedback comprises alerting a user when the total dose delivered during the time period meets or exceeds a preset threshold.
10. The method of claim 2 , wherein providing the feedback comprises disabling the device when the total dose delivered during the time period meets or exceeds a preset threshold.
11. The method of claim 2 , further comprising calculating and displaying a cumulative total dose delivered over a session period that includes the time period.
12. The method of claim 2 , further comprising detecting a user's puff on the vaporizer device, wherein the time period corresponds to a duration of the detected user's puff.
13. The method of claim 2 , wherein the vaporizable material comprises a liquid.
14. The method of claim 2 , wherein the vaporizable material comprises a tobacco-based material.
15. The method of claim 2 , wherein the vaporizable material comprises a botanical.
16. The method of claim 2 , wherein the vaporizable material comprises a nicotine compound.
17. The method of claim 2 , wherein the vaporizable material comprises a cannabinoid.
18. The method of claim 2 , wherein the vaporizable material comprises at least one of: cetirizine, ibuprofen, naproxen, omeprazole, doxylamine, diphenhydramine, melatonin, or meclizine.
19. The method of claim 2 , wherein the vaporizable material comprises at least one of: albuterol, levalbuterol, pirbuterol, salmeterol, formoterol, atropine sulfate, ipratropium bromide, fluticasone, budesonide, mometasone, montelukast, zafirlukast, theophylline, fluticasone and salmeterol, budesonide and formoterol, and mometasone and formoterol.
20. The method of claim 2 , wherein the vaporizable material comprises at least one of: a polyphonel, a green tea catechin, caffeine, a phenol, a glycoside, a labdane diterpenoid, yohimbine, a proanthocyanidin, terpene glycoside, an omega fatty acid, echinacoside, an alkaloid, isovaleric acid, a terpene, gamma-aminobutyric acid, a senna glycoside, cinnamaldehyde, and Vitamin D.
21. The method of claim 2 , wherein the vaporizable material comprises a nicotine salt, glycerin, and propylene glycol.
22. The method of claim 2 , wherein the dose predictor is part of a controller comprising the heater controller.
23. The method of claim 2 , wherein summing the calculated partial doses comprises aggregating the calculated partial doses as each partial dose is calculated.
24. A method of determining a dose of a vaporizable material when using a vaporizing device over a time period, wherein the time period comprises a plurality of sequential time intervals, and wherein the vaporizing device includes a heater controller, a heater, a source of the vaporizable material, and a dose predictor, the method comprising:
applying power, from the heater controller to the heater, to vaporize the vaporizable material during the time period;
transmitting a power reading of the power applied from the heater controller to the heater at each of the plurality of sequential time intervals, from the heater controller to the dose predictor;
calculating, for each of the plurality of sequential time intervals and at the dose predictor, a partial dose, wherein the partial dose is calculated based on subtracting a second term and a third term from a first term, wherein the first term comprises the power reading of the power applied from the heater controller to the heater to vaporize the vaporizable material during each of the plurality of sequential time intervals, wherein the second term comprises a temperature of the vaporizable material during each of the plurality of sequential time intervals, and wherein the third term comprises a temperature of the vaporizable material before each of the plurality of sequential time intervals;
summing the calculated partial doses, at the dose predictor, to determine a total dose delivered during the time period; and
providing feedback, based on the total dose, to modify the operation of the vaporizer device.
25. The method of claim 24 , further comprising:
transmitting the temperature of the vaporizable material during each of the plurality of sequential time intervals, from the heater controller to the dose predictor.